Merge pull request #203 from JuliaGeodynamics/pa-dependabot

[CI] Configure Dependabot for GitHub Actions and Julia

Author: aelligp

.github/dependabot.yml

@@ -2,6 +2,28 @@
 version: 2
 updates:
   - package-ecosystem: "github-actions"
+    groups:
+      # Group all GitHub Actions PRs into a single PR:
+      all-github-actions:
+        patterns:
+          - "*"
     directory: "/" # Location of package manifests
     schedule:
       interval: "monthly"
+    open-pull-requests-limit: 100
+    labels:
+      - "dependencies"
+      - "github-actions"
+
+  - package-ecosystem: "julia"
+    directories:
+      - "/"
+      - "/test"
+    schedule:
+      interval: "monthly"
+    groups:
+      all-julia-dependencies:
+        patterns:
+          - "*"
+    labels:
+      - "dependencies"